Grammar.pm6

my token tag       { '%' \w+ }
my token id        { '#' \w+ }
my token css-class { '.' \w+ }
my token level-token { '  ' }
my token text { .+ }

my rule element {<tag>?<id>?<css-class>*\s* }
my token line {^^ <level-token>* [<element>]* $$}
#                                           ^ This hangsup the whole rakudo
like '%p', &line;
like '%p#asd', &line;
like '#asd', &line;
like '.foo', &line;
like '%body.asd.foo', &line;
like '%head#asd.foo', &line;
unlike '#asd#foo', &line;
unlike '%hear#asd#foo', &line, "Two id\'s on one element are not allowed";
unlike '%head%asd.foo', &line;
unlike '#head#asd%foo', &line;
unlike ' %head', &line;
like '  %head', &line;
unlike '   %head', &line;
like '%body %textsdasd', &line; # <= Trying to parse this